Vim: Built-in File Explorer

# Open
:Explore
:Ex
# Close
:Rexplore
:Re

# Bottom horizontal split
:Hexplore
:He
# Top horizontal split
:Hexplore!
:He!
# Close
:quit
:q

# Left vertical split
:Vexplore
:Ve
# Right vertical split
:Vexplore!
:Ve!
# Close
:quit
:q

:Texplore
:Te